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Community Member

OSPF network in multiple areas

Resently I discovered that one of my core routers has a network statement in multiple area (ie Area0 and Area1). At this time, there appears to be no problems. Here is a sample of what I found:

(Obviously IP's have been altered to protect the inocent)

network 10.10.58.0 0.0.0.255 area 0

network 10.10.96.0 0.0.31.255 area 1

network 10.10.128.0 0.0.31.255 area 1

network 10.10.253.0 0.0.0.255 area 1

network 10.10.224.0 0.0.31.255 area 0

As you will note network 10.10.253.0 0.0.0.255 area 1

is also included in network 10.10.224.0 0.0.31.255 area 0

due to the masking. I am not sure why it being used, but I would think there is some violation here.

Is this acceptable?

Chris

1 REPLY

Re: OSPF network in multiple areas

I would say, the interface would still be in area 1. If multiple statements are given, for the the same network, the first matching command, will be taken into effect. So I think, there would be no effect for the second statement (network 10.10.224.0 0.0.31.255 area 0) on the interface falling into network 10.10.253.0/24. This network would remain in area 1.

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